- B.A. in Classics, summa cum laude, Harvard University, 1966.
- Diploma in international economics with distinction, University College, Oxford, 1967.
- LL.D. cum laude, Harvard University Law School, 1970.
William Weld was a federal prosecutor in the United States Justice Department from 1981 to 1988. In 1991, he became a Republican governor of Massachusetts, a post he held until 1997.
In November 2006, he rejoined the international law firm of McDermott Will & Emery as a partner in its New York office.
William Weld has also tried his luck as a mystery writer (Mackerel by Moonlight, 1998), according to the magazine Mother Jones with limited success.
William Weld entry at the Official Website of the Commonwealth of Massachusetts.